105243839 has 2 divisors, whose sum is σ = 105243840. Its totient is φ = 105243838.

The previous prime is 105243781. The next prime is 105243841. The reversal of 105243839 is 938342501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105243839 is a prime.

It is a super-2 number, since 2×105243839² = 22152531294915842, which contains 22 as substring.

Together with 105243841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 105243799 and 105243808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105243539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52621919 + 52621920.

It is an arithmetic number, because the mean of its divisors is an integer number (52621920).

Almost surely, 2^105243839 is an apocalyptic number.

105243839 is a deficient number, since it is larger than the sum of its proper divisors (1).

105243839 is an equidigital number, since it uses as much as digits as its factorization.

105243839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 105243839 is about 10258.8419911801. The cubic root of 105243839 is about 472.1343086497.

The spelling of 105243839 in words is "one hundred five million, two hundred forty-three thousand, eight hundred thirty-nine".